Page 170 - New Medley 5 Semester 2

EXERCISE 7.5

A. Draw a circle for each of the following radii:

1. 4 cm 2. 6 cm 3. 4.5 cm 4. 6.2 cm
B. 1. Draw a circle of diameter 10 cm.

2. Using a pair of compasses, draw a circle of radius 4.8 cm with centre

O. Draw a diameter AOB and measure it.
3. Draw a line segment AB of length 7 cm. With the centre A, draw a

circle of radius 4 cm and with centre B, draw another circle of radius
3 cm. Do the circles touch each other?

4. With the same centre P, draw three circles of radii 2 cm, 3 cm and 4 cm.
Find the measure of their diameters.

C. Find the circumference of the circles having:

1. radius = 6 cm 2. radius = 11 cm

3. radius = 6.5 cm 4. diameter = 8 cm

5. diameter = 14 cm 6. diameter = 12.4 cm

D. Find the approximate radius of the circle whose circumferences are:

1. 30 cm 2. 150 cm 3. 240 cm 4. 750 cm

E. Construct a circle having approximate circumference 18 cm by finding its
radius.

F. The Parliament House in New Delhi is a circular building with a radius
approximately 85.5 m.

1. What is the diameter of the building?

2. What is the approximate circumference of the building?

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